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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898d841e14f6c4532739c933063486f42586aeb05a1dff07fc693195d9c57646' 
  AND token = 'c02yfotnH1VOT8nyUrkG4buqHfOg5y9z0lRjY3JD75k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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