Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9cca2c157a6efc8f2fdcb13b96eede1075ddf9351a6ffa9f1c89dda2022fb04' 
  AND token = 'ndA2S++TqwSvYhxhepvyLph93BI7+vqiUmdrcjFLEi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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