Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '495c3af1d72f348b4b800d14e97daecd15348c72af414fb44ff6afe577880e15' 
  AND token = 'DzA7QiYIbw2QoC4vV9r4zidT0syI3b8odrESmJNQZjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}