Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '212ef89664439747c50913765c7940ae28ded2c2f90793bd3284c58f0db1a845' 
  AND token = 'XZxPPJigOcSPCljfDf+A/2ttxlpyxNo8efO3g+//g38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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