Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fcb8a3c54bfb0e052046b70ed8d9698ae3d8b208e626dc64bdb8ff79b1f47a0' 
  AND token = 'CzilSLmMy7nkobLyxR28g8wdM2nSii/fjXAPSN432Ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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