Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '398a818ae62f342fab442d4aa59de5d40a2dccd8a1ee5d00cae33fa25017123b' 
  AND token = 'vRRmRQpsOVxGbjuBDyDwLdqNgwaWTuC5ogftRWjejvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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