Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4449cecada60c2beb2617051102804a004d9863e38fa332dbed2b5a25890a73' 
  AND token = 'fte5jo2R8kR+Qy3fUs0RMvaWR0M3I6jTLKCyAxTel7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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