Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd410850f16bb00cae639cf190ad99c9dc7394b92dc57a1e26ebe9c98d9bfc994' 
  AND token = '6RtXHefG9s8YwObM9AY6bW6j9sIkZkaXrPRHuhKg3t4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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