Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbc98e5001a25527a74fdd7b1310fa0728d120cfe665017fc7dac12cc28d2bd0' 
  AND token = '8AwIZst0F7EW2Uf4sfddzavfoakb3T+7AKlxTaU8/Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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