Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c47e6d8f564be1a3a4315f66c5658336226c82ab392803b71a50f7d2d0008655' 
  AND token = 'EW/CYFduwx72RvpkQYz7OP4lkAvvCZtp4j3U+SyIa78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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