Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9960bd00a07aa4389136a87401809427ef3d00d24197fc6186c9ce3f02668f3' 
  AND token = '5JowyhJRSAE+Os9J2ccGeduf13f1ld7ssCAj9FFNeTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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