Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b78a883e6565dceb14acb17991c3d5ebbeb7849d03bd9a606355a41474a928e' 
  AND token = 'zjkiQgFpXSDt3/IxAWSAA7gOWYw6iHZO22eXBdeg3i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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