Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '507f84d3f106d8d4c87e32ebe52ec25f944abaa1c7d9db24f33bb70c7a07c06f' 
  AND token = 'yLjAKwyStT8PnvRhai8eh+IMg2kODVL+zu4E0CfyK/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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