Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc507d8a8605c4203b8f9fc10ebc09d31b2e33ed778a9c48a40f9b855a1b221f' 
  AND token = 'kLCdzZTig+1z4QXix5izu8WrlCNtz0kTMbG7Yy23Fs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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