Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9c590eddca90e44fe8d28b66f102777d9ce9507f13b8bb89571f5ddb89b2d52' 
  AND token = 'jxTM++R5mgOHV/XgvkqlvOMZT74IkWt4qC42u13bxgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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