Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '951cd6d428cdf6be904554a957f1e472ccc7039a4c42554992d48b4c53b7969f' 
  AND token = 'iEI5rsTlsVs3hCEnubh0It5/aZ3alosTylDp7Z8QqVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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