Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c321592882e6e44eff50e717b4ef7596546e5db0e60631cf494979625ce47f4c' 
  AND token = '4uSrO3KtRFkLSh8dx0/iXLNXlVVYHm6Wyj4TEqmXPV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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