Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d12641bdf53b33a87bbea91438af5813c55fa2bbb7bbc8ad8df6358c2e7c5b4' 
  AND token = 'xLj06IDqJkc6PHsGL8VbIOjsX1yQiWq8mXNz+slVFxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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