Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4c356b2d2b8d17a196fed6f43483c112460b13e141619e13c95213f5a24ac8d' 
  AND token = '7YpxYKjSwO2TZEYhd4ekOe82bVFMxEpWgC/UCNJ0STI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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