Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4742a88f85b3c3bdc33ac1bb034476e056fceb314a9cf9db8b7ea49909cfb4c6' 
  AND token = 'rwgszP+Pcp+EiIJT4vIehZ4KTp1y3Dm5kbD9T0vb7zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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