Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '484dbbc324fd463f43d8b0555b82550546448cf141f9a72a74112fcfc63b9664' 
  AND token = 'l84q60UZr59NXEjXxkEbxvJZTbvNUa0euNoUWISEB3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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