Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ab13a8ee98cb47a46876b159f6fcee95f7b1f098172d0d6ed1199e8bc461a1a' 
  AND token = '4TcdrqUVvciK1iSGYTBTQnqh/o9uYeJtLHPvpT7qquA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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