Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a9864b0a147dc53ba97b1782230ad98b53424698b8c18f7ce1aa69f7b792ec6' 
  AND token = 'gbR+o1deSXDEt03Y9+fQabrXtRrjQUJ9SiDWRPuJuHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00087

JSON explain

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