Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0180c0be8e0483814df303bbfff3bc26b03774980030be85fc56746ebfd3fd2' 
  AND token = 'SDg91xfEOK0IVbjt5Lk7mj5FzS7FdBFhzrlKgN7K7Us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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