Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df88e8db0f473825e225e699ee4039f5cf1e0092bb4be8f53a0102097a148e3d' 
  AND token = 'L3g644pnGXVjLff7noOh3kE6zc9VWzhF7h63ooImx1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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