Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5103951cfb23fd2bb6c2033808ed0d844755ff220fd77ce5024780bb53b3b010' 
  AND token = 'maODfnoMi703YEh+RZo4SHjbO4/AVcSHaAiWofmyE0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}