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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d74745110f37215dd84fa76af6487a4d9c884f1c8cf054ec5726c74074a4650' 
  AND token = 'xTIjdbriXOtX0Ue790woa5o8ImK4xw5smyh/WJ6nQ64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}