Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3addf7ddf24ee18812fadd6390d5682c48b54a7e68b972ce2118a97df2cf3015' 
  AND token = 'uB/ecXkk2G+mJT7BOwjnj2Mb85Nlu44wpE9qOZ+ULes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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