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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ecd72814279d55b83d113e35c9b7649fdfd52f36a7ddb7dfe49ae29fc9945191' 
  AND token = 'yp9bX2UNdg6JJNeBeqWQD4TAErbWonpVya7gnSrbnqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}