Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a27e0e8b988fe29c11a80c79228770a0fa3a49ebb25a8101cd00a43cfd895c5a' 
  AND token = 'HRBidxKji3l/BBBObaDEht45+FM4Wqnbmampr7dOcUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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