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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1043c27cf6f83db82ff4d5986dab86c94bbcd37376334df8033604f5c252edde' 
  AND token = 'JJHoN743vTYpR8QIqV2tIzPzFRij4yIwE3MVde6QMjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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