Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99cc0ec08f34639f108f6420438ed0e1163ceec4fc48e566513a1f3b9ac4b229' 
  AND token = 'qsWVjE33Vg7TyoulBNgMeLklZbm2PPKRw+4qtDXA3C8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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