Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ecf3e25e4ed6a047f295c91b41533b1ac36bcdab25108e2ae5b20af9ee48de2' 
  AND token = 'dcX5nyCKneUwHh8WYbd+jnR/U04ESuW6BxhVxangHp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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