Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd044b175cc01c5da3733fd915072dfc439f9734aeaf6104e68cd35c41a64f5' 
  AND token = '3KREFz94sYOoIwWuTP0dEGBG5U1aVSvjfMT7aPszWac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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