Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cc6b7e30a2299d36b2559cf8c30b66591bff3f58ce5682015bbe110bedc1197' 
  AND token = 'ZZcL21/wXsGhxKeGXP7rP554k4/BayeSasPCWQAo7QU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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