Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bfa93730759e58e10a0195baeaf2f0e0061df6795983ec8ffed41e34a12bb21' 
  AND token = '2UijHV+/5MmrhnuDusJIK2566z+T6vvqw0UAIk1Ry9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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