Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17b703b36a6f5da15743f8d787c362af0c7667bf8c43c5fa3c38df08654784f9' 
  AND token = 'OGkGbFZji7w3zvxNFRFucxz0lwmi1CCGUZZI/oS/MrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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