Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '948213ec80961d68aa99b07f7fd6ce2c3dcdaa787f57572e13b623f3d4df86b1' 
  AND token = 'RhCcrdIXf1Fv1f1lKtadWg93IAphHJg/Wv1/1CyQX4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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