Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea7b3fa80ad26fdaf0f11e13bb5a9edf89ca452da85e864bb83648c6d508959a' 
  AND token = 'hCk5urDX54rVUcEfMM1RQHx3sOlJucb1GYWt37HZndo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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