Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bccbe83346d26df5e2c2f004fcdf099bf9ecf4d29bfb3f85b6bcebaa5ff2c1e7' 
  AND token = 'qPsdOFo8uMfuSnaKftefLclkZhbw3c7zwsHou1G42Ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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