Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96698ddf079a79d74bd478b123875c98dd56a5e22e791f8d17b307559d81e05e' 
  AND token = 'PS2Etlz2ndISP8RwdY+HrY/1Pc+9FNHAFCjAJNFfH3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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