Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b49548b2fb87255f4dd01363f253e23a9e67eec5d41fe99dfef9c0dc2962180' 
  AND token = 'IyE/MTPT/0f+SZNJhSy2DfTGJyfrHfEE4QwijxywElk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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