Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67f3b28748dc1e66b0b8ebdab498463032542089c078ae37accdcbcd803f683b' 
  AND token = 'JM3IC+MbjDQI4+q6Z1KwyK+eJJu8T/O5uNDqLqkhBt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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