Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e249d250e353067452deed0c11c3c24dec017b202dc1d22d09a19ddc2b037e1' 
  AND token = 'mVi4HzN6w4Hj2iZqWkkvwyGBswZmfhihgAOYQ5WezmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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