Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fd7b4d8dbcb1945d2a8bb98276019ef0e28d417b3e0d162f0c56d505d1f500c' 
  AND token = 'IMcZTsAUqtdPoNkrnskrleFCndrTI4BDmhWHSmX/eAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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