Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de241d47085bfd74dc7c8a0c20fcb8691509e8ddffc9602977eb481f1d97af5' 
  AND token = 'Mgzj83u6F5GYprf9pPyNrb93eiiuBbKOC7SjoxjRnPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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