Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6974ac065db96cae487c6a46f3c2eb0bd63496f7edaebcc185b08b6061df407b' 
  AND token = '0dV4+gYMX8Ye2kApOFsa0VVtunB6zxXroasi65YgR74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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