Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97e6e1e601c40a56b9374635c2ab8caba3852e3aa5bd7d1098ec9146c517b459' 
  AND token = 'dLpjFsJDCVCenV+P+SNKaPDHT2JaS0LNyvW7esl30Do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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