Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a792ff6d7463a2b3f0a423539b8de35c2642844cd6cb0f01974fdbdbfa87c7f7' 
  AND token = 'CSoazHW3elAgZZ1ziJeEPfHUclAizEi46Pe3PDKPdF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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