Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0619d71844b02fe1851c4515c0c39a71850db605b7ad8d62ad9a5ba3c2dcce4' 
  AND token = 'vgL8/9iD3cwK7DdCAq0QaZcp6RUbJR6Hqqdpboltl0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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