Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '999fd466397006271270d4af1fb0ee80d3edd6617dc7a6a710114fc5b15ad8a4' 
  AND token = '8gL2X6wSC8wsFUOuGP90cKnirURV+UK6jjCt9HxOxjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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