Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1496e501079ca5f15036ead7172e57a3522a43afd69a02e7be56338dbb7425e1' 
  AND token = 'YCLvIT/QEC8qkL5hYh4zPcyTggEcpQM85jm5BC4BVdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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