Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a728e7c61c3291b3713f29632e71b90725edea22e30877aedb85435bb7a0d5af' 
  AND token = 'hspxt4MrPnhSufbwPb23oINldXflg4ECAw37f4FEC7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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