Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7c3261d63f44ac2d6f5c4b2f156c218b3f2c8f654af3ae7f57433c59a2ccc8f' 
  AND token = 'N33B5Lj6hWt1ghMzeu5pdDdQCcKhJ7cG9uEYPMW7mWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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