Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7644b79ce2d7fedc207950cb463c98544fe7d4c15957049c90618fd57168a7b6' 
  AND token = 'FqraGkH9Lz14cNzFT6ujxrKywsjECE8HO1cvy3DQqqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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