Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '421320d512ba4f389cbbfc202cb9b35cec7199217a78884d423e5a763f22595e' 
  AND token = 'eP/+RpP6CNnAvma8L799G+I1JrV3DqhWeHaVhUtAonE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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