Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16a57224935692dce4f60cf42718cab803340a65ee1be3f5dc3e127f8e78b673' 
  AND token = 'vT7Xmcfzxe6DADLecX6zvre9N0iFgYOOKc81npDPTCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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