Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fabc41ffce07970036dbf1ee176a689c845794443c729db45e1011026b21d763' 
  AND token = 'ng1EuYqs9UEgQii5h9NYFdKsB4mKQnhw+9M36eXDOGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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