Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '900fbbe1b05dcad6051244cb3af399fbff95cde34e21fc068cdcf1be1811bbe8' 
  AND token = '4rRWKNhww/rjLzAJvLHBKddVnCgEiba2xfDYiAIjvj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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