Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba62258901db2d4ec4607ebb4dea7564592064d11006d1b0644f3904f99256c4' 
  AND token = 'ztxcbQNpBkP29d/Us6LI5V/15xjAyZDSIvK4S/0bMTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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