Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a031db2c7d3d25445b7a5074d054e88ab7ad8a67dcd7017fa07677ed6c85860c' 
  AND token = 'gCI2C/O6CQvVKs9jbw2zyh+u/bCY6KaGdKiXNwEGEAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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