Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30327904f1514520cf56715bd39602d9ffbb79fbc23a7f5f3206363127edc223' 
  AND token = 'u6hXpG252BAdax42kOsTR1bDb5gtpKBADFcv7xkw6lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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